Wheel construction.



PATENTED MAR. 6, 1906.

F. P. PRENDER-GAST.

WHEEL CONSTRUCTION.

APPLIGATION FILED JULY 31,1905.

M17 flcmmw UNITED star s FRANK P. PRENDERGAST, or DAGUS in Frien s rim writsr new .i. At lL .QLQ Uri a r/Eire MINES, PENNSYLVANUL Specification of Letters Fatent.

Patented March 6, 1906.

Application filed July 31,1905. Serial No, 272,069.

1 all whom it may concern.-

Be it known that I, FRAN K P.PRENDERGAST,

I a citizen of the United States, residing'at Dawheel structure, and aims to provide a novel means being shown in dotted lines.

-' a transverse sectional view form oftire for wheels and peculiar securing means" therefor, including a special form of rim or felly structure for the wheel and a pcculiar' form of channel-iron.

For a full description of the invention and the mer ts thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to. the following descri tion and accompanying drawings, inwhic Figure 1 is a side elevation of the wheelpartiallybroken away, showing the application of the invention, certain parts of the securing Fig. '2 is taken about on the line a: w of Fig. 1. Fig. 3 is a vertical section through one of the coils-of the tire and taken about at a right angle to the line of the section an as represented by Fig. 2. Fig. 4 is a perspective view showing a portion of the tire of the wheel, bringing out clearly the formation. of the circumferential groove and lateral grooves leading thereto at intervals.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

'tual conditions of service.

In the practical embodiment of the invention it is designed to provide a tire which will be an effective substitute for the present rubher tires most commonly in use, the tire em; bodying the invention being indicated at 1 [and consisting of a length or strip of metal coiled upon itself to form a plurality of adjacent spring coils or volutes 2, the outer ortions of each coil or volute 2 beingwider t an the innermost portions, as shown most clearly as the weight is received thereon to yield and subserve the resilience of the tire under ac- The edge portions ofthe outer portions of the coils 2 of the tire 1' .are rounded, as shown at so that this portion can move freely in .themanner before described. The felly 3 of the wheel has the spokes attached thereto in any conventional way, and said felly has the channel-iron disposed thereon, said channel-iron being oi a size to permit of ready compression oi the code 2 and the tire as weight is received thereon. As shown in Fig. 2, the sides of the channel iron are spaced somewhat from the inner portions of the coils 2, thereby admitting of a compressing action of the coils, expanding the inner portions in a manner which will be readily evident.

The tire 1 is peculiarly attached to the channel-iron 5, certain of the coils of the tire at predetermined intervals in its length hav ing threaded fastenings 6 attached thereto. The'fasteni'ngs 6 embody a threaded shank rovided with a square or rectangulanshaped head 7, the shank bein adapted to screw into an opening in the coi 2, to which the fastening is secured, said shank passing through the o emng in the channel-Hon 5 in order. that t is fastenmgs may secure the tire firmly to said channel-iron. The fastenings 6 are not only utilized to secure the tire I to the channel-iron, but said fasteningsare ads ted to mterloci; the channel-iron with the fe 1y 3 by reason of the peculiar construction of theparts. For this purpose the fclly 3 is provided with a-circumferential grooves, and

leading from the side of the felly and the groove 8 are a plurality of transverse or lateral grooves or passages 9. The passages 9 are situated at intervals in the circumference of the folly, determined by the intervals between the fastenings 6 of the tire, the above being necessary in order that after the tire has been secured to the channel-iron thehcads 7 of the fastenings 6, which project from the inner side of the channel-iron, may be forced into the lateral grooves 9 on the folly by mov ing the channel-iron. and tire laterally thereon. When the tire 1 and the channel-iron 5 are bodily moved laterally or transversely on the felly, the heads 7 of the fastenings 6 register with the grooves 9. As soon as theheads 7 enter the grooves 8 the channel-iron and tire may he moved circumferentially with reference to. the folly, and this'will cause the heads 7 of the iasienings 6 to be interlocked with the folly by the disposition of said heads in the circumferential groove 8 When the channel-iron and the tire are thus. connected with the folly, suitable fastenings 10, preferably consisting of threaded parts, are screwed through the felly from the inner side thereof in the openings 1] in the channel-iron 5, and

said parts it) will nrevent circumferential movement of-the chanmzl-iron on the folly and secure the channel-iron and tire in position preventing displacement of the parts in a rn ner w l'iich will be clear. To remove the tire from the channel-iron, 1t is lirst necessary to remove the fastenings 10am by circumf rential movement of the ch annel-iron cause the heads of the fastenings 6 to register with .i the grooves S), whereupon lateral movement the channehiron will throw the some oil of the folly The tire I can now he removed from the channel-iron, if this is necessary.

it will he noted that the form of the heads of the fastening-s 6, which are rectangular in hape, is such that the nugly received in the roove 8 are prevented "roiin turning, and like ihoou of the same be ing unscrewed from thetire is entirely obviated.

Having thus described the invention what is claimed as new is- 1. In combination, a folly, a channehiron,

a tire, and fastening s securing the tire to the channel-iron and adapted to interlock the channel iron with the felly by a lateral and circumferential movement of the channeliron on the folly.

2. combination, a folly, QT'channeI-iron, tire, and fastcnings securing the tire to the fuel-iron and provided with heads pro- 1h; ,tingi from the inner side of the channoh A -on, the telly being providedwith a circum- 113131111312 groove to receive the fastomngs of y if? to interlock the channel-iron with the o. In combination a folly provided with a circumferential groove, and lateral grooves said heads when leading thereto, a channel-iron, a tire on the channel-1ron, fastenlngs securing the tire to the channel-iron and having the heads thereof projecting from one side of the channeliron, the fastenings of the tire being situated at intervals equal to the intervals between the lateral slots on the felly, whereby the heads of the said fastenings may be passed into the lateral'slots on the folly, and by circumferential movement of the channeLiron caused to interlock in the circumferential groove thereof, and means for preventing circumferential movement of the channeliron after the same has been interlocked with the felly.

4. In combination, a folly, a channehiron thereon, a tire on the channel-iron, means carried by the channel-iron adapted to interlock the same with the folly, by lateral and circumferential movement of the channeliron on the felly, and means for preventing circumferential movement of the channeliron after the same has been interlocked with the folly.

5. In combination, a folly, a channel-iron, 

